| 摘要 |
<p>The device comprises a ferromagnetic sealing ring (2), which is inserted into an annular groove of a screw-retained annular flange. An insertable handle bar (5) is provided between the annular flanges, which has a magnetic shoe (6) at its one end with a retainer (7) extending at the outer diameter of the sealing ring adjusted by a part of the height of the sealing ring. The retainer for the sealing ring comprises a row of radially oriented permanent magnets (8) extending in the circumferential direction.</p> |
